AutoCodes – GMC – P0C0B GMC

P0C0B GMC Code - Drive Motor '1' Inverter Positive Voltage Circuit

Quick Answer

This is an internal fault detection of the drive motor generator Power Inverter Module (PIM) Assembly. Common causes include Reprogram Power Inverter Module (PIM) Assembly, Faulty Power Inverter Module (PIM) Assembly, Power Inverter Module (PIM) Assembly harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0C0B GMC indicates Drive Motor '1' Inverter Positive Voltage Circuit.
Common causes: Common causes include Reprogram Power Inverter Module (PIM) Assembly, Faulty Power Inverter Module (PIM) Assembly, Power Inverter Module (PIM) Assembly harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,282

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0C0B GMC Description

This is an internal fault detection of the drive motor generator Power Inverter Module (PIM) Assembly. The PIM monitors the Drive Motor '1' Inverter. The ECM sets the OBDII code when the Drive Motor '1' Inverter is not to factory specifications. This fault is handled inside the PIM and no external circuits are involved.

OBDII Code P0C0B GMC - Drive Motor '1' Inverter Positive Voltage Circuit - AutoCodes.com — P0C0B GMC Code - Drive Motor '1' Inverter Positive Voltage Circuit

What does this mean?

What are the Possible Causes of the DTC P0C0B GMC?

Reprogram Power Inverter Module (PIM) Assembly
Faulty Power Inverter Module (PIM) Assembly
Power Inverter Module (PIM) Assembly harness is open or shorted
Power Inverter Module (PIM) Assembly circuit poor electrical connection

How to Fix the DTC P0C0B GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0C0B GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0C0B GMC code?

Need more information on how to fix the P0C0B GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0C0B GMC code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0C0B GMC Code

1. What does the OBDII code P0C0B mean on a GMC vehicle?

The P0C0B code indicates an issue with the Drive Motor '1' Inverter Positive Voltage Circuit, which pertains to the electrical system managing the high-voltage inverter for the vehicle's drive motor.

2. What are the common symptoms of P0C0B in a GMC?

Symptoms may include reduced power, the vehicle entering limp mode, warning lights on the dashboard (such as the check engine light), and decreased efficiency in hybrid or electric systems.

3. What causes the P0C0B code to appear?

Common causes include a faulty drive motor inverter, damaged or corroded wiring, loose electrical connections, or a malfunctioning voltage sensor within the inverter circuit.

4. Is it safe to drive with a P0C0B code on a GMC?

Driving with this code is not recommended, as it may lead to reduced performance or further damage to the high-voltage electrical system.

5. How is the P0C0B code diagnosed?

A technician will use a scan tool to confirm the code, inspect the inverter and related wiring for damage or corrosion, and test the voltage circuit for irregularities.

6. Can a P0C0B code be fixed without replacing the drive motor inverter?

Yes, if the issue is caused by damaged wiring, loose connections, or a faulty sensor, repairs to those components may resolve the issue without replacing the inverter.

7. What tools are needed to troubleshoot a P0C0B code?

Troubleshooting requires an OBDII scanner, a multimeter to test voltage and continuity, and possibly specialized tools for working on high-voltage systems.

8. How much does it cost to repair a P0C0B code on a GMC?

Costs can vary widely; minor repairs like fixing wiring may cost a few hundred dollars, while inverter replacement can exceed $2,000 depending on the model.

9. Can clearing the P0C0B code solve the problem?

Clearing the code may temporarily remove the warning, but unless the underlying issue is resolved, the code will likely return.

10. What preventative maintenance can help avoid a P0C0B code?

Regular inspections of the high-voltage system, ensuring connections are secure, and addressing electrical issues promptly can help prevent this code.